// Controller
import { Controller, Get, Query } from '@nestjs/common';
import { RangeService } from './range.service';

interface ResponseObject<T> {
  code: number;
  data: T;
  msg: string;
}

@Controller('range')
export class RangeController {
  constructor(private rangeService: RangeService) {}
  @Get()
  index(@Query('num') num: number): ResponseObject<number[]> {
    if (isNaN(num)) {
      return { code: -1, data: [], msg: '输入错误' };
    }
    return {
      code: 0,
      data: this.rangeService.index(num),
      msg: '请求成功！',
    };
  }
}

// Service
import { Injectable } from '@nestjs/common';

@Injectable()
export class RangeService {
  index(num: number): number[] {
    const result: number[] = [];
    for (let i = 1; i <= num; i++) {
      result.push(i);
    }
    return result;
  }
}